Data processing

End user data processing

• Creation of DEMs from LIDAR point clouds
• Creation of DEMs from NextMap data (subsetting and resampling)
• Creation of DEMs from SRTM 90m data
• Conversion of vector maps to raster maps and GeoTiff images

Useful tools

• ​FWTools - includes the GDAL tools for data conversion and the free OpenEV viewer (vectors + rasters)
• ​ENVI Freelook - image viewer part of ENVI, good for viewing images and taking spectral profiles
• ​GRASS - freeware GIS (powerful and full featured, but hard to use)

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Troubleshooting

• Common or known problems
• Handling bad ATM scanlines
• Choosing an appropriate pixel size
• Finding out what the wavelengths and bandwidth are (for a specific flight)

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ARSF internal processing

• LIDAR processing details
• Applanix navigation processing
• Boresight calibration procedure
• Radiometric calibration procedures
• Overview of the AZ Systems processing chain
• CaliGeo usage
• Correction of timing errors
• Lever arm offset details
• Converting Lat/Long to BNG
• GPS base station network adjustment
• IPAS Pro navigation processing
• GrafNav GNSS processing
• ALS Post processing

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